Also, it's important to call and talk to them, don't just look at the web page and decide the company doesn't have anything. Many companies will not have everything they can offer on their web site, and many companies will modify some standard pump they have to accomodate your requirements. If the salesman you talk to doesn't have what you want, ask him if he knows of any company that does. Often times, they'll make some good suggestions since they're in the business, and if they don't have what you want, and if they're not the kind of company that will do a 1-off, they will generally know enough about their own industry to know who might make what you're looking for.